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1、Chapter 008 Communications and Networks8-1Multiple Choice Questions1. One of the most dramatic changes in connectivity and communications in the past few years has been: A. widespread use of mobile devices with wireless Internet connectivityB. chat roomsC. satellite uplinksD. running programs on rem
2、ote computers2. In a communication system, which among the following originate and accept messages in the form of data, information, and/or instructions? A. Communication channelB. Sending and receiving devicesC. Connection devicesD. Data transmission specifications3. In a communication system, whic
3、h among the following convert messages into packets that can travel across the communication channel? A. Connection devicesB. Sending and receiving devicesC. Storage devicesD. Secondary devices4. Which physical connection is the fastest? A. Twisted pairB. Coaxial cableC. Fiber-optic cableD. Microwav
4、eChapter 008 Communications and Networks8-25. Which among the following is considered a line-of-sight communication medium? A. Broadcast radioB. SatelliteC. BluetoothD. Microwave6. WiMax stands for: A. Wide-area access for maximum reachB. Wide-area range to maximize accessC. Worldwide interoperabili
5、ty for microwave accessD. Worldwide access to maximize interoperability7. Microwave communication uses high-frequency: A. radio wavesB. infraredC. satellite communicationsD. optic fibers8. LTE stands for: A. Long Term EvolutionB. Light Traffic EvolutionC. Laser Transmission EntityD. Long Time Entry9
6、. The GPS device in an automobile uses which communication channel? A. InfraredB. Radio Frequency (RF)C. MicrowaveD. SatelliteChapter 008 Communications and Networks8-310. A service that uses existing telephone lines to provide high-speed connections is called: A. WWANB. 3G/4GC. VoicebandD. DSL11. C
7、ellular services use _ to provide wireless connectivity to the Internet. A. ADSLB. T1 and T3 cellular networksC. DSLD. 3G and 4G cellular networks12. The capacity of a communication channel is measured in: A. bandwidthB. bit capacityC. band rateD. data flow13. Using this type of communications chann
8、el, several users can simultaneously use a single connection for high-speed data transfer. A. VoicebandB. Medium bandC. BroadbandD. Baseband14. Every computer on the Internet has a unique numeric address called a(n): A. domain addressB. protocol addressC. IP addressD. Web addressChapter 008 Communic
9、ations and Networks8-415. _ is the process of breaking down information sent or transmitted across the Internet into small parts. A. ProtocolB. BandwidthC. IdentificationD. Packetization16. The essential features of this include identifying sending and receiving devices, and breaking information int
10、o small parts for transmission across the Internet. A. DNSB. TCP/IPC. FTPD. HTTP17. The _ is the central node that coordinates the flow of data by sending messages directly between the sender and receiver nodes. A. clientB. serverC. switchD. gateway18. In a computer network, this node requests and u
11、ses resources available from other nodes. A. ClientB. ServerC. Directory serverD. Host19. This device enables connectivity between two LANS or a LAN and a larger network. A. Network gatewayB. NodeC. HubD. RouterChapter 008 Communications and Networks8-520. A wireless access point that provides Inter
12、net access in a public place such as a coffee shop, library, bookstore, or university. A. HotspotB. NICC. BlindspotD. Gateway21. A network topology in which the central node is connected to two or more subordinate nodes that in turn are connected to other sub-ordinate nodes. A. StarB. BusC. MeshD. T
13、ree22. This type of network strategy uses central computers to coordinate and supply services to other nodes on the network. A. Peer-to-peerB. Client/serverC. BitTorrentD. Personal Area Network23. Organizations use the following to allow suppliers and others limited access to their networks. A. Intr
14、anetsB. ExtranetsC. FirewallsD. Proxy serversChapter 008 Communications and Networks8-624. All communications between a companys internal networks and the outside world pass through this server. A. Base stationB. NodeC. SupercomputerD. Proxy25. Remote users can connect to an organizations network th
15、rough this type of secure private connection. A. VPNB. DSLC. WWAND. P2P26. This type of network topology does not use a specific physical layout. A. HybridB. HierarchicalC. MeshD. TreeTrue / False Questions27. Connection devices are the actual connecting or transmission medium that carries the messa
16、ge. True False28. Telephone lines use coaxial cables. True FalseChapter 008 Communications and Networks8-729. Fiber-optic cable transmits data as pulses of light through tiny tubes of glass. True False30. Modulation is the name of the process of converting from digital to analog. True False31. TCP/IP protocol involves identifying sending and receiving devices and breaking information into small parts for transmission across the Internet. Tr
